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magento2 – Magento 2 Model file Const get in Helper

Magento 2 Model file Const get in Helper.

I want to this type :-

File Path :- GetSomeMojoCategoryLandingPageModelEntityAttributeSource


namespace GetSomeMojoCategoryLandingPageModelEntityAttributeSource;

use MagentoFrameworkOptionArrayInterface;

class Landingpageproducts extends MagentoEavModelEntityAttributeSourceBoolean implements ArrayInterface

    const VALUE_NO = 'lpage_no';
    const VALUE_NEW = 'lpage_new';
    const VALUE_FEATURED = 'lpage_featured';
    const VALUE_SALE = 'lpage_sale';

    protected $_options;

    public function getAllOptions()
        return (
            ('value' => self::VALUE_NO, 'label' => __('No')),
            ('value' => self::VALUE_NEW, 'label' => __('New Products')),
            ('value' => self::VALUE_FEATURED, 'label' => __('Featured Products')),
            ('value' => self::VALUE_SALE, 'label' => __('Sale Products'))

Above const value get in Helper file.

So Please Help me how to get const in helper.


magento2 – Override a helper using Plugin

I have been trying to use plugin to override MagentoSalesHelperReorder.php but I am not sure how and have been stuck with this problem. Basically I am trying to override the function in this helper file. I have added a comment inside the code what I would like to change.

     * Check is it possible to reorder
     * @param int $orderId
     * @return bool
    public function canReorder($orderId)
        $order = $this->orderRepository->get($orderId);
        if (!$this->isAllowed($order->getStore())) {
            return false;

        $currentOrder = $this->registry->registry('current_order');
        if ($this->customerSession->isLoggedIn() || isset($currentOrder)) {
            \WHAT I AM TRYING TO DO - canReorder() change to canReorderIgnoreSalable()
            return $order->canReorderIgnoreSalable();
        } else {
            return false;

How can I do this through plugin?

list manipulation – KenKen Puzzle Helper – Dropping order-less sequences

In the following example, I am generating all the variants of a $9 times 9$ KenKen puzzle that come in groups of three using addition that result in $18$.

  data = Select(Tuples(Range(9), 3), Plus @@ # == 18 &)

This generates


I can then do something to search for repeated cases without order

  Cases(data, {OrderlessPatternSequence(1, 8, 9)})

This generates (I want to delete all those after $198$ from data, but to do it for each unique set of three digits).


This approach has two drawbacks, I had to know the sequence to test for, then I can use that to drop all the repeats from data. I would have to repeat this for the next unique sequence.

Is there a simple way to create

 data2 = some_fancy_command(data)

It produces data2 (note – I don’t care about the commas either), which only has unique 3-digit numbers regardless of order

$${{189},{279},{288}},{369},{378}}… $$

What is the easiest way to do that?

Note that I am familiar with, but only want a helper as opposed to a solver.

Aside: My goal is to have a tool that effectively duplicates as maybe a CDF of just an MMA Notebook where I enter all the cages, their type, the size of the puzzle and it provides hints on all the numbers that can go into the cage.

magento2 – Get userid of the admin logged in magento 2 helper

Below is a helper with a dependency and you can see within one of its function how the backend user id is read


namespace MbsBackendScreenHelper;

use MagentoFrameworkAppHelperAbstractHelper;
use MagentoFrameworkAppHelperContext;

class AdminUserReaderHelper extends AbstractHelper
     * @var MagentoBackendModelAuthSession
    private $authSession;

    public function __construct(
        Context $context,
        MagentoBackendModelAuthSession $authSession
    ) {
        $this->authSession = $authSession;

    public function doSomethingWithMyAdminUserId()

        $adminUserId = $this->authSession->getUser()->getId();


dependency injection – How to solve the dilemma of helper functions relying on an object?

My issue can be concisely described as: is there any way (in PHP, or a pattern) to force default parameters at the time a class is called with the keyword use so that people can just…well, use it, instead of having to deal with setup?

I usually have my functions that don’t really depend on much and don’t have side-effects inside a Wrappers class.

Inside that Wrapper class, I found myself to be needing an object, a dependency. Now, of course, I have a service provider that I can retrieve it from. It looks like this:

use Services;

class Wrappers
    public function helpMeDoSomething()
        //an object implementing MyServiceInterface
        $service_i_need = Services::get( 'name' );

        //do something with the service.

But, of course, that’s heavily problematic. Even if I do very granular & proper checking on $service_i_need, I’m still hiding a dependency. When someone looks at the function, it’s not directly clear that it relies on a MyServiceInterface and so, given I was out of ideas, I simply decided to go up one level and make the Wrappers depend on the MyServiceInterface, then wrap it all inside a service itself, so:

class Wrappers

    public function __construct( MyServiceInterface $service_i_need )
        $this->service_i_need = $service_i_need;

    public function helpMeDoSomething()
        //We can use $this->service_i_need here!

Great! Now I just register my service: Services::register( 'wrappers', new Wrappers( new ServiceINeed ) ) and all’s good.

Well, except now my Wrappers class needs instantiation, which means I can’t use Wrappers; at the top of my document, so, as a developer that wants to use Wrappers, I’d now have to do:

use Services;

$wrappers = Services::get( 'wrappers' );

To me, use is an absolute (good) word: **it shows whoever’s reading the document that it’s a dependency that’s needed 100% of the time and it doesn’t need any form of instantiation or setup.

You see, my Services package can be brought into a document with use Services and up until the point, we’re roughly on the same page as doing use Wrappers, however, the problem with this is that my Wrappers are supposed to only be no-side-effects functions that you can use on your data, whereas a service is an object that you should definitely type-hint, so, the expected outcome of use Services is wildly different from use Wrappers.

I’m stuck.

All I want is to globally expose a default implementation of a class such that its functions can be used statically.

In short, I want to initialize Wrappers on my own as the creator of this package, then for others to just do use Wrappers; and then for them to use Wrappers::helpMeDoSomething()…and as I implemented every solution, although basic, it dawned on me: whatever uses Wrappers::helpMeDoSomething() also indirectly depends on the service that Wrappers depends on.

Basically, the “blindness” level of whoever’s using Wrappers is as deep as the function call tree – if you’re calling my helpMeDoSomething() inside function A, then A gets called inside B, then B inside C, you are depending on an MyServiceInterface object…you just don’t know it or it’s very deeply hidden.

How to solve this?

How to merge two descending singly linkedlist into one ascending linkedlist using Recursion without any helper method?

enter image description here

Here is my solution:
I want to know if my solution fits the requirement 100%? Or if there is any better solution?

Constraint of the question:

  1. must be singly linkedlist

  2. must use recursion, and no helper methods allowed.

  3. The method must return the head node of the merged list.

     class Solution{
     Node dummy=new Node(0,null);// the dummy node to store the merged result
     public   Node mergeAscend(Node a,Node b){
         if(a==null&&b==null){//base case
             return null;
             if((a!=null&&b==null)||a.value>=b.value){// insert "b" after dummy
                 //store the next node of current a, before pointing to;
                 //insert Node "a" between dummy and
             else if((a==null&&b!=null)||a.value<b.value){//insert "a" after dummy


context sensitive help – What is the name for a pattern featuring helper text in a semi-transparent overlay?

I am seeing an emerging design pattern in web apps that is used for helping new users get oriented to a page or application.

It consists of showing a diagram with succinct helper-text over a semi-transparent overlay, sometimes with arrows pointing to specific controls on the page. One of the best example of this I have seen is in UX Pin, an online wireframing/design tool.

Has anyone ever utilized this pattern – and if so, what is it called? Or how did you refer to it?

I am also interested in learning how it is accomplished. Is there a tool or plug-in that might be useful for achieving this effect, and is it possible to do this in a reusable fashion without placing static text in a transparent png?

magento2 – How to Use Helper Function in checkout_cart_index.xml?

I’ve to override checkout_cart_index.xml file from vendor/Magento for removing estimate shipping and discount code block!
It’s working successfully but my requirement is…it only should run when an admin or user select Yes from config part.I’ve tried ifconfig part but it’s not working. Can anyone suggest any better idea to fulfil this requirement!? Here’s my code of checkout_cart_index.xml. In this code set true in part is for removing Discount code and the above part is for for removing estimated shipping block and also override shipping.phtml

        <action method="setTemplate">
            <argument name="template" xsi:type="string">vender_extensionname::shipping.phtml</argument>
            <argument name="jsLayout" xsi:type="array">
                <item name="components" xsi:type="array">
                    <item name="block-summary" xsi:type="array">
                        <item name="config" xsi:type="array">
                            <item name="componentDisabled" xsi:type="boolean">true</item>


    <referenceBlock name="" remove="true"/>

Here’s my config part

in which if user set to yes in discount code then it should be displayed but if one select NO then it should not be displayed.I’ve created helper data.php for fetching that yes no value but I’m confused in how to use helper function in my XML part.